{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:CEUU6Y7V5LZ5SOCNLGRPEW7YSC","short_pith_number":"pith:CEUU6Y7V","canonical_record":{"source":{"id":"1605.00776","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2016-05-03T07:55:21Z","cross_cats_sorted":[],"title_canon_sha256":"6573d5b4e82746292f6f54f6385bbc7d87df513cabc313d0f1cdf5a6caf391a5","abstract_canon_sha256":"1f976f6fca7bc98390b627da439e24d27670aa05bf6f333dae0106991ce83372"},"schema_version":"1.0"},"canonical_sha256":"11294f63f5eaf3d9384d59a2f25bf890b30f5e2c520b98f19a64076563788187","source":{"kind":"arxiv","id":"1605.00776","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1605.00776","created_at":"2026-05-18T01:04:20Z"},{"alias_kind":"arxiv_version","alias_value":"1605.00776v1","created_at":"2026-05-18T01:04:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1605.00776","created_at":"2026-05-18T01:04:20Z"},{"alias_kind":"pith_short_12","alias_value":"CEUU6Y7V5LZ5","created_at":"2026-05-18T12:30:09Z"},{"alias_kind":"pith_short_16","alias_value":"CEUU6Y7V5LZ5SOCN","created_at":"2026-05-18T12:30:09Z"},{"alias_kind":"pith_short_8","alias_value":"CEUU6Y7V","created_at":"2026-05-18T12:30:09Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:CEUU6Y7V5LZ5SOCNLGRPEW7YSC","target":"record","payload":{"canonical_record":{"source":{"id":"1605.00776","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2016-05-03T07:55:21Z","cross_cats_sorted":[],"title_canon_sha256":"6573d5b4e82746292f6f54f6385bbc7d87df513cabc313d0f1cdf5a6caf391a5","abstract_canon_sha256":"1f976f6fca7bc98390b627da439e24d27670aa05bf6f333dae0106991ce83372"},"schema_version":"1.0"},"canonical_sha256":"11294f63f5eaf3d9384d59a2f25bf890b30f5e2c520b98f19a64076563788187","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:04:20.605222Z","signature_b64":"wf14DEyrYOXom5wdoISjCNltR1uDK9ItFcD2tf0tHfODPywA4+byRbyiIcIutjLj0rZUX4u2Pf2FRflGYHQDCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"11294f63f5eaf3d9384d59a2f25bf890b30f5e2c520b98f19a64076563788187","last_reissued_at":"2026-05-18T01:04:20.604792Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:04:20.604792Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1605.00776","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:04:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QR8tukKSs8Ea0cHwjV1ryFVwVfwnTdNrjimw/lwKj0vKwCJcx1kXn43MKo9C3rVfa18USblEksToTttOVndAAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-02T12:55:59.014966Z"},"content_sha256":"6891ba3d07ed0c2c13c6116a0195dfec86174842e3651fb3c313a932d32c9250","schema_version":"1.0","event_id":"sha256:6891ba3d07ed0c2c13c6116a0195dfec86174842e3651fb3c313a932d32c9250"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:CEUU6Y7V5LZ5SOCNLGRPEW7YSC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Optical properties of VO$_2$ films at the phase transition: influence of substrate and electronic correlations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"Angelika Polity, Marc Dietrich, Martin Dressel, Tobias Peterseim","submitted_at":"2016-05-03T07:55:21Z","abstract_excerpt":"Thin films of VO$_2$ on different substrates, Al$_2$O$_3$ and SiO$_2$/Si, have been prepared and characterized from room temperature up to 360 K. From the band structure in the rutile metallic phase and in the monoclinic insulating phase the optical properties are calculated and compared with reflection measurements as a function of temperatures. Various interband transitions can be assigned and compared with previous speculations. We extract the parameters of the metallic charge carriers that evolve upon crossing the insulator-to-metal phase transition and find effects by the substrate. The e"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1605.00776","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:04:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3zAQSI1+ONLWays3Pqy7/9uyUybYNjPg4AirR5XsHEr/xUaPTQK5k4HZkV7BDEb4kovsPVqskN7k93eU6hs1AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-02T12:55:59.015301Z"},"content_sha256":"93f65461d45439dd61ad4a418ed17df70fb78a9a453be9345a1b6a146cb9eb55","schema_version":"1.0","event_id":"sha256:93f65461d45439dd61ad4a418ed17df70fb78a9a453be9345a1b6a146cb9eb55"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CEUU6Y7V5LZ5SOCNLGRPEW7YSC/bundle.json","state_url":"https://pith.science/pith/CEUU6Y7V5LZ5SOCNLGRPEW7YSC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CEUU6Y7V5LZ5SOCNLGRPEW7YSC/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-07-02T12:55:59Z","links":{"resolver":"https://pith.science/pith/CEUU6Y7V5LZ5SOCNLGRPEW7YSC","bundle":"https://pith.science/pith/CEUU6Y7V5LZ5SOCNLGRPEW7YSC/bundle.json","state":"https://pith.science/pith/CEUU6Y7V5LZ5SOCNLGRPEW7YSC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CEUU6Y7V5LZ5SOCNLGRPEW7YSC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:CEUU6Y7V5LZ5SOCNLGRPEW7YSC","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"1f976f6fca7bc98390b627da439e24d27670aa05bf6f333dae0106991ce83372","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2016-05-03T07:55:21Z","title_canon_sha256":"6573d5b4e82746292f6f54f6385bbc7d87df513cabc313d0f1cdf5a6caf391a5"},"schema_version":"1.0","source":{"id":"1605.00776","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1605.00776","created_at":"2026-05-18T01:04:20Z"},{"alias_kind":"arxiv_version","alias_value":"1605.00776v1","created_at":"2026-05-18T01:04:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1605.00776","created_at":"2026-05-18T01:04:20Z"},{"alias_kind":"pith_short_12","alias_value":"CEUU6Y7V5LZ5","created_at":"2026-05-18T12:30:09Z"},{"alias_kind":"pith_short_16","alias_value":"CEUU6Y7V5LZ5SOCN","created_at":"2026-05-18T12:30:09Z"},{"alias_kind":"pith_short_8","alias_value":"CEUU6Y7V","created_at":"2026-05-18T12:30:09Z"}],"graph_snapshots":[{"event_id":"sha256:93f65461d45439dd61ad4a418ed17df70fb78a9a453be9345a1b6a146cb9eb55","target":"graph","created_at":"2026-05-18T01:04:20Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"Thin films of VO$_2$ on different substrates, Al$_2$O$_3$ and SiO$_2$/Si, have been prepared and characterized from room temperature up to 360 K. From the band structure in the rutile metallic phase and in the monoclinic insulating phase the optical properties are calculated and compared with reflection measurements as a function of temperatures. Various interband transitions can be assigned and compared with previous speculations. We extract the parameters of the metallic charge carriers that evolve upon crossing the insulator-to-metal phase transition and find effects by the substrate. The e","authors_text":"Angelika Polity, Marc Dietrich, Martin Dressel, Tobias Peterseim","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2016-05-03T07:55:21Z","title":"Optical properties of VO$_2$ films at the phase transition: influence of substrate and electronic correlations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1605.00776","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:6891ba3d07ed0c2c13c6116a0195dfec86174842e3651fb3c313a932d32c9250","target":"record","created_at":"2026-05-18T01:04:20Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"1f976f6fca7bc98390b627da439e24d27670aa05bf6f333dae0106991ce83372","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2016-05-03T07:55:21Z","title_canon_sha256":"6573d5b4e82746292f6f54f6385bbc7d87df513cabc313d0f1cdf5a6caf391a5"},"schema_version":"1.0","source":{"id":"1605.00776","kind":"arxiv","version":1}},"canonical_sha256":"11294f63f5eaf3d9384d59a2f25bf890b30f5e2c520b98f19a64076563788187","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"11294f63f5eaf3d9384d59a2f25bf890b30f5e2c520b98f19a64076563788187","first_computed_at":"2026-05-18T01:04:20.604792Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:04:20.604792Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"wf14DEyrYOXom5wdoISjCNltR1uDK9ItFcD2tf0tHfODPywA4+byRbyiIcIutjLj0rZUX4u2Pf2FRflGYHQDCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:04:20.605222Z","signed_message":"canonical_sha256_bytes"},"source_id":"1605.00776","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6891ba3d07ed0c2c13c6116a0195dfec86174842e3651fb3c313a932d32c9250","sha256:93f65461d45439dd61ad4a418ed17df70fb78a9a453be9345a1b6a146cb9eb55"],"state_sha256":"058786030586d322449f721b5a08d96f476325ab7541f8c72da59a7e8e2e725f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NXUpgMe1ANzTln+QQx5QqpuuQiLGXwkFKz36Qz5BSPtfKv5Zacw6i6e4BbEiNnl6qZzQDaFZXa4B8nCLuFuZCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-02T12:55:59.017244Z","bundle_sha256":"0a29eeb9f533c0e63b8076e918e4973edc976b430698acd7e83a7b78f362165f"}}